The 100% plastic Dal Negro Texas Hold'em invisible ink cards are really famous in Italy and many other Europe countries. Dal Negro Texas holdem marked playing cards are available in red and blue with very special pattern on the back. Some guys want to mark these playing cards with their UV invisible ink pen by hand but they can't do it well. That's quite normal. Even with the right ink, people can't mark the PVC playing cards well by hand. Usually the good marked cards are marked by special machine. Welcome to contact for more information if you have any interest in Dal Negro Texas Hold'em invisible ink marked cards.